Thermoplastic Rubber sole Heel measures approximately 1 inches" Extra Cushion and Comfort: A rubber foam midsole for advance arch support, comfort and shock absorption Great Traction and Protection: The rubber outsole delivers the great traction and grip on land or in water. A closed toe cap helps protect against pebbles, rocks or branches Quick-Drying: The soft and quick-drying lycra lining keeps your feet dry and comfortable throughout any water sports Adjustable: A hook-and-loop closure make these athletic sandals easy to slip on and off with a snug fit FITTING: Run Big. Please order one size smaller than usual